EMERGENCY!! Please HELP

[ALang]

I'd take it slow with all your additions/subtractions of your overall parameters.
8.0 is not bad at all for pH. Let things settle a bit before you start all the adjustments.
Your corals had a huge shock, they are going to go through the next little while at a slow limp. So keep your other parameters steady, keep an eye on the pH, but don't panic over it, either. Keep quality of water up, and wait.